Add hero section to home page with scroll collapse

- Full-screen dark gradient hero on home page
- Search input centered vertically
- Smooth collapse to fixed header on scroll
- Added hero translations (ru/en)

nuxt.config.ts

@@ -20,7 +20,7 @@ export default defineNuxtConfig({
     defaultLocale: 'ru',
     // @ts-expect-error lazy is a valid option but missing from types
     lazy: true,
-    langDir: 'locales',
+    langDir: 'i18n/locales',
     locales: [
       {
         code: 'ru',
@@ -55,6 +55,7 @@ export default defineNuxtConfig({
           'ru/footer.json',
           'ru/ganttTimeline.json',
           'ru/goods.json',
+          'ru/hero.json',
           'ru/howto.json',
           'ru/kyc.json',
           'ru/kycOverview.json',
@@ -117,6 +118,7 @@ export default defineNuxtConfig({
           'en/footer.json',
           'en/ganttTimeline.json',
           'en/goods.json',
+          'en/hero.json',
           'en/howto.json',
           'en/kyc.json',
           'en/kycOverview.json',